A SRI Lankan man is "at the end of his journey" in Australia after today being convicted of stealing thousands of dollars' worth of mail as an Australia Post employee.

Pradeepan Loganadan, 29, signed an understanding with the Federal Government that he will voluntarily leave Australia now after pleading guilty to possessing tainted property and stealing by a clerk or servant in the city's Magistrates Court.

Police prosecutor Rowan Brewster-Webb told the court Loganadan had worked at a Toowoomba post-sorting facility for the last four years and was caught after investigators from Australia Post alerted police to the potential theft of mail in the lead up to Christmas 2018.

The court heard six Australia Post crates and numerous parcels were located near wheelie bins at the property and in his personal car, as well a slew of electrical goods taken from the postal packages.